Optical Device White-Point Adjustment for Ambient Light
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Solution Overview
Problem
Optical devices calibrated for white point during production fail to seamlessly integrate or distinguish images with varying ambient light conditions, leading to mismatched white tones.
Innovation Solution
An optical device with a laser module emitting adjustable color ratio laser light, adjusted based on ambient light composition, using a sensor and computing device to determine and correct the color ratio for seamless integration or distinction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the optical device uses a fixed white point calibration from production, then the manufacturing process is simple and quick, but the white point matches poorly with varying ambient light conditions
Solution Approach 1:
The patent implements dynamic adjustment of the white point by detecting ambient light conditions and modifying the color ratio of laser diodes in real-time. The computing device calculates correction data based on detected ambient light composition and adjusts the intensity ratios of red, green, and blue laser diodes dynamically, allowing the display to adapt to different lighting environments rather than relying on fixed production calibration
Solution Approach 2:
The system employs a feedback mechanism where the sensor continuously monitors ambient light conditions and feeds this information to the computing device, which then adjusts the laser diode output accordingly. This closed-loop control enables the optical device to automatically compensate for changes in ambient light temperature and composition, maintaining optimal white point matching without requiring manual recalibration
2Adaptability or versatility
If the optical device adjusts the color ratio dynamically based on ambient light, then the adaptability to environment improves, but the device complexity increases
Solution Approach 1:
The computing device serves multiple functions: it detects ambient light conditions, calculates correction data, determines optimal color ratios, and controls the laser diode intensities. By consolidating these functions into a single processing unit, the patent reduces overall system complexity despite implementing dynamic adaptation. The sensor module also serves dual purposes of ambient light detection and white point measurement
Solution Approach 2:
The system adjusts the intensity parameters of individual laser diodes (red, green, blue) to change the overall color ratio. By modifying only the intensity parameters rather than the physical structure or adding complex optical components, the patent achieves dynamic adaptability with minimal increase in device complexity. The adjustment is accomplished through electrical control of diode current levels
3Adaptability or versatility
If images are blended seamlessly with the environment, then the visual integration improves, but the distinction between displayed content and environment decreases
Solution Approach 1:
The system dynamically switches between blending mode and distinction mode based on operational requirements. In blending mode, the white point is matched to ambient light for seamless integration. In distinction mode, the system intentionally deviates from the matched white point to enhance visibility and differentiate displayed content from the environment, providing flexible visual integration control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables seamless integration or intentional distinction of images with the environment by matching or deviating the white point, enhancing user experience in varying lighting conditions.
Implementation Method 1
a sensor for detecting a light composition of an ambient or scene light, in particular a colorimeter
Implementation Method 2
a laser module emitting laser light having an adjustable color ratio
Implementation Method 3
the color ratio is generated by a composition of light generated by at least two differently colored color laser diodes
Data Source
AI summary
An optical device and method for adjusting a color ratio of a laser light, a laser module emitting laser light having an adjustable color ratio. A light composition of an ambient or scene light is detected, and the color ratio of the laser light is determined depending on the light composition. Glasses, an optical instrument, and a head-up display including the optical device, are also described.